My husband and I are trying to conceive, so I may be a few days pregnant. With that in mind, I came down with an awful cold. I haven't used any otc or prescription medication. I have, however, used echinacea for two days, and have used lavender,eucalyptus, and tea tree essential oils with steam inhalation. I am wondering if any of the above mentioned practices pose a threat if I am only a few days pregnant? Any input is greatly appreciated